1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4ed7767c19a413571c052b06afdbb38d7879e729e1351e831aef0fc1b29e4c. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03f39286-5d3f-4aec-8105-0ccfded6ff14.json and https://artists.proofprofile.net/proofs/artist/03f39286-5d3f-4aec-8105-0ccfded6ff14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cabb3a99d78ae3a7369392ba34f983ca666551c355055ba6f492d3a1ca2ccd. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd50d47a9266492450a47b8f905c99ebba91013107a98606280d8e0096a9cd6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78172c892b90db52d6f956641d96e20e0d30947742b2e3f8c239d9923033cde6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063a18c24c3c67555eadf6911c7c9347b1e4ab2535b8e4591f2d18893a996a54. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba93327b6a8fc12811a9947117f685121c078c8d68c826bdd494d1bc3ddbc24c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56997b9e87877335d0b94bf8eb35072014a320c11691e6e76ab965cf1aa5a12c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f04531df27b4460b798601305fbafec3f8e1b9a65c3978cb1c61bd76d74d89. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671b5f01147338788bb5b40824fd9cdec2e0d6d032995146535b839642238e8c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1688cb6a4f40a457bfdfa0caf930f2fc5e2de142dbd15d8ee552422e82897cbe. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9737d9ba47a456304efcd6e2b3d0ccb4b48146f35aad855cde56a75c0dab4e22. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce8e53f5c7d9e663815b5a196119b22996e5d3a99658a751133e2bde7544a67. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beae37b8b7f754221f1b43376f7ec6960d98fdb6020cd85e5de7c3bf6cccd94. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82074494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b47306c7a93ef29d635c07b86e9639940be2b74507209de7bee7d0c404e2163. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c819311174d0ce7267c58da23dcf004b7d25d93815d545ea0a22c95b9827c9f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872f52324accf0e552cc17b6c0ea79baaf0686e880a2e289e7b232b2a6c22f1a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41bb2c40a82705be8d242505b747cf3c21f2dca72d6f0f6b53d2aab68b50e67. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0be6d94044a74eb6abb31d20c3de08b7d5ac3e9aba320cabc7daff79d65454. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6846c83c3fa1db4c0172a87dcade2c0c0893dedaf4cd3cb6f895bf378e876ef1. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa019f0f1aca3bf9a92ed95334b0b8a1dbf0aa06214e214de04799433497048. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e423ece1ad62e022fadb119b8d2bf9dc8599638b2c594ae7a91608ff07251ac. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6335852133dfb44a87d4083ca764cc1d99424d6c00cd390ce9d9237e3f1204a2. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2fce1f78c268b662d9459d4f0dce777c4fa67b0c5d02f7fa012006439eed48. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f3c8a4e3e0810c7e37a1a75f56a94790ed6e5ad5ebb9ac110297409a686398. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aab9d771170576cec9e3b91a1d9a146a313461c0f660ea4083c16a9c07e0800. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31845f24408e2501fcdcb60d9aa4eac916eeb985207832c0fac152c6a5af1f6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd80caa4be611d80cd94cb77a543ab2d86a0b8bce67af535cde0825085880b5. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeef4f373b7d054b93439ebe024a24e4f60c8e6eb88a8a22581e4b537dfb4a05. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62154274.